From: Daniel Stenberg <daniel@haxx.se>
Date: Sat, 12 Jun 2021 16:59:46 +0000 (+0200)
Subject: multi: add scan-build-6 work-around in curl_multi_fdset
X-Git-Tag: curl-7_78_0~142
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77bc35901f558c5198672099671b2d0eb3787566;p=thirdparty%2Fcurl.git

multi: add scan-build-6 work-around in curl_multi_fdset

scan-build-6 otherwise warns, saying: warning: The left operand of '>='
is a garbage value otherwise, which is false.

Later scan-builds don't claim this on the same code.

Closes #7248
---

diff --git a/lib/multi.c b/lib/multi.c
index 1b3e261c68..d91f13db04 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -1043,7 +1043,12 @@ CURLMcode curl_multi_fdset(struct Curl_multi *multi,
 
   data = multi->easyp;
   while(data) {
-    int bitmap = multi_getsock(data, sockbunch);
+    int bitmap;
+#ifdef __clang_analyzer_
+    /* to prevent "The left operand of '>=' is a garbage value" warnings */
+    memset(sockbunch, 0, sizeof(sockbunch));
+#endif
+    bitmap = multi_getsock(data, sockbunch);
 
     for(i = 0; i< MAX_SOCKSPEREASYHANDLE; i++) {
       curl_socket_t s = CURL_SOCKET_BAD;